Measuring-pole



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' R."HEGA'RTY. MEASURING POLE.

No. 595,475. Patented Deo. 14,1897.

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UNITED STATES PATENT muon.

REUBEN HEGARTY, OF MADERA, PENNSYLVANIA.

MEASURING-POLE.

SPECIFICATION forming part of Letters Patent'No. 595,47 5, dated December 14, 1897.

Application tied pin so, 1897.

T all whom it may concern:

Be it known that I, REU'BEN. HEGARTY, of Madera, in the county of Clearfield and State of Pennsylvania, have invented certain newl and useful Improvements in Measuring- Poles; and I do hereby declare the following to be a full, clear, and exact description of measures,and especially in poles or rods which are made extensible longitudinally.

Myimproved measuring-pole is hereinafter described, and the novel features are specifically indicated.

In the accompanying drawings, forming part of this specification, Figure l is a perspective view of a portion of a measuringpole constructed in accordance with this invention. Fig. 2 is a longitudinal section. Fig. 3 is a cross-section; and Figs. 4 and 5 are cross sections, on an enlarged scale, of the two sections of the measuring-pole.

I construct my improved measuring pole of longitudinal sections or members, which are so connected as to be adapted to slide one on another and which have no projecting parts. 1

In the drawings, 1 and 2 indicate the members of the pole, which are generally rectangular in cross-section, and therefore when secured together present also a rectangular iigure. These sections or members of the pole are held together against lateral play, but capable of longitudinal movement,by means of a guide 3 upon member 1 and a slide 4 upon member 2. The slide and guide are so made that when they coact the adjacent faces of the members are in contact with each other, as shown, to present not only a finished device, but to prevent the entrance of dirt or particles between the sliding poles of the two members. v

' In the particular construction illustrated the face of the member 1 is provided with a longitudinal groove 5, in Which the guide 3 is situated, said guide consisting, preferably, of a sheetmetal piece having overhanging Iianges 6Y in the manner shown. In the particular construction illustrated these overserai No. 634,639. oto man.)

hanging flanges 6 of the guide stand slightly beyond the face of the member 1, as shown.

The member 2, upon which the slide 4 is secured, is provided with a central rib 7 on its inner face, which stands a little beyond the edges of the member. On each side of this rib 7 are grooves 8, while the slide 4, which consists of a strip of sheet metal, is secured upon its rib and projects over the grooves 8 and almost to the outer sides thereof. In this way it is seen that between the outer edges of the slide 4 and the grooves 4a pocket is formed, which receives the Iianges 6 of the guide. These parts are so made that a close and tight fit is secured, which holds the two members of the pole together and in the position illustrated, and while relative lateral movement is effectually prevented the parts can move longitudinally, as is obvious.

For holding the members rigid with relation to each other I employa spring-actuated detent 9, that is situated within a suitable recess 10 in said member 2. This detent is pivoted between its ends and lies entirely withinthe recess-that is to say, there are no parts which project beyond the face of the member 2. One end of this detent is provided With a finger-piece 11, beneath which the spring 12 is situated, While the other end 3 is provided with a series of openings 14 toreceive said pin 13 and thus hold the members with relation to each other. Of course the distance between the openings 14 can vary as desired, while, for instance, it maybe one foot. Devices are also provided for holding the members at any other point, which consists of a thumb-screw 15, passing through a screw-threaded opening 16 in the member 2 and through the slide 4,while the head of the thumb-screw is situated in a recess 17 in said member. By means of this thumb-screwthe two members can be wedged together at any point.

It will be seen from the foregoing description that I provide an extremely simple and durable measuring-pole, which is compact and comprises the minimum of parts, which are not liable to get out of order, while the loo screw passing through one of said members and adapted t0 engage the other of said members, the head of said thumb screw being situated Within a recess in the member to which it is secured.

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

REUBEN HEGARTY.

Vitnesses:

J. J. JOHNSTON, A. J. CORNELY. 

